test_that("example", {
  d <- as.data.frame(Titanic)

  p <- ggplot(d) +
    aes(x = Class, fill = Survived, weight = Freq, by = Class) +
    geom_bar(position = "fill") +
    geom_text(stat = "prop", position = position_fill(.5))
  ggally_expect_doppelganger("titanic", p)
  ggally_expect_doppelganger("titanic-facet", p + facet_grid(~Sex))

  ggally_expect_doppelganger(
    "titanic-dodge",
    ggplot(d) +
      aes(x = Class, fill = Survived, weight = Freq) +
      geom_bar(position = "dodge") +
      geom_text(
        aes(by = Survived),
        stat = "prop",
        position = position_dodge(0.9),
        vjust = "bottom"
      )
  )

  ggally_expect_doppelganger(
    "titanic-stack",
    ggplot(d) +
      aes(x = Class, fill = Survived, weight = Freq, by = 1) +
      geom_bar() +
      geom_text(
        aes(label = scales::percent(after_stat(prop), accuracy = 1)),
        stat = "prop",
        position = position_stack(.5)
      )
  )

  data(tips)

  ggally_expect_doppelganger(
    "tips",
    ggally_rowbar(tips, mapping = aes(x = smoker, y = sex))
  )

  # change labels' size
  ggally_expect_doppelganger(
    "tips-size8",
    ggally_colbar(tips, mapping = aes(x = smoker, y = sex), size = 8)
  )

  # change labels' colour and use bold
  ggally_expect_doppelganger(
    "tips-color-white",
    ggally_colbar(
      tips,
      mapping = aes(x = smoker, y = sex),
      colour = "white",
      fontface = "bold"
    )
  )

  # display number of observations instead of proportions
  ggally_expect_doppelganger(
    "tips-label",
    ggally_colbar(
      tips,
      mapping = aes(x = smoker, y = sex, label = after_stat(count))
    )
  )

  # custom bar width
  ggally_expect_doppelganger(
    "tips-bar-width",
    ggally_colbar(
      tips,
      mapping = aes(x = smoker, y = sex),
      geom_bar_args = list(width = .5)
    )
  )

  # change format of labels
  ggally_expect_doppelganger(
    "tips-label-custom",
    ggally_colbar(
      tips,
      mapping = aes(x = smoker, y = sex),
      label_format = scales::label_percent(accuracy = .01, decimal.mark = ",")
    )
  )

  ggally_expect_doppelganger(
    "ggduo-titanic",
    ggduo(
      data = as.data.frame(Titanic),
      mapping = aes(weight = Freq),
      columnsX = "Survived",
      columnsY = c("Sex", "Class", "Age"),
      types = list(discrete = "rowbar"),
      legend = 1
    )
  )
})

test_that("stat_prop() works with an y aesthetic", {
  d <- as.data.frame(Titanic)
  p <- ggplot(d) +
    aes(y = Class, fill = Survived, weight = Freq, by = Class) +
    geom_bar(position = "fill") +
    geom_text(stat = "prop", position = position_fill(.5))
  ggally_expect_doppelganger("titanic-stat-prop", p)
})